CN105152459A - Process for treating wastewater produced in regeneration of SCR denitration catalyst - Google Patents
Process for treating wastewater produced in regeneration of SCR denitration catalyst Download PDFInfo
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- CN105152459A CN105152459A CN201510427856.1A CN201510427856A CN105152459A CN 105152459 A CN105152459 A CN 105152459A CN 201510427856 A CN201510427856 A CN 201510427856A CN 105152459 A CN105152459 A CN 105152459A
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- wastewater
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- waste water
- biochemical treatment
- scr denitration
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Abstract
The invention relates to a process for treating wastewater produced in regeneration of an SCR denitration catalyst, belonging to the technical field of treatment of industrial wastewater. The wastewater successively passes through a regulating pool, a chemical feeding and reaction pool, a tilting-plate precipitation pool, an A2O biochemical treatment pool and a clear water tank, wherein a biological membrane reactor is arranged inside the A2O biochemical treatment pool. A technical scheme of the invention is as follows: chemicals are added into the chemical feeding and reaction pool, so most of suspended matters and a part of organic matters and heavy metal ions in the wastewater are removed; phosphorus and nitrogen in the wastewater are removed via the A2O biochemical treatment pool; organic pollutants in the wastewater are thoroughly decomposed via the biological membrane reactor, and a biological membrane can effectively retain active sludge in the A2O biochemical treatment pool at the same time; therefore, it is realized that treated wastewater achieves discharge standards and can be reused in industrial production, and beneficial technical effects and significant practical values are obtained.
Description
Technical field
The present invention relates to a kind of waste water treatment process, particularly a kind of regeneration SCR denitration waste water treatment process, belongs to industrial waste water treatment.
Background technology
Gas denitrifying technology is the effective means controlling discharged nitrous oxides, wherein with selective catalytic reduction (SelectiveCatalyticReduction, the plurality of advantages such as SCR) denitration efficiency is high, and reaction process no coupling product, device are simple, reliable, easy to maintenance obtain domestic and international widespread use.Business SCR denitration conventional is at present vanadium titanium series, in regenerative process particularly for the useless denitrating catalyst after reaching work-ing life, suspended substance (SS) content in the waste water of cleaning link is higher, and is V containing the active ingredient in some catalyzer
2o
5, WO
3deng, thus also contain corresponding salt and ammonia nitrogen pollutant in its factory effluent, if not treated, directly entering outside atmosphere will cause the eutrophication of water body.
Summary of the invention
For solving problems of the prior art, the invention provides a kind of regeneration SCR denitration waste water treatment process, concrete technical scheme is as follows:
A kind of regeneration SCR denitration waste water treatment process, described waste water by equalizing tank, dosing reaction tank, inclined-plate clarifying basin, A2O biochemical treatment tank, clean water basin, is provided with biofilm reactor in described A2O biochemical treatment tank successively.
As the improvement of technique scheme, described inclined-plate clarifying basin is connected with sludge sump with bottom A2O biochemical treatment tank, and the supernatant liquor of described sludge sump is back in equalizing tank.
As the improvement of technique scheme, bottom described equalizing tank, be provided with aerating apparatus.
As the improvement of technique scheme, in described dosing reaction tank, first add calcium hydroxide, flocculant of polymeric aluminium chloride, polyacrylamide, heavy metal chelating agent, then molysite, reductive agent, calcium hydroxide successively.
As the improvement of technique scheme, between described inclined-plate clarifying basin and A2O biochemical treatment tank, also comprise intermediate pool, in described intermediate pool, be mixed with sanitary sewage.
Technique scheme first adds chemical agent in dosing reaction tank, remove most suspended substances, partial organic substances and heavy metal ion in waste water, again by the phosphorus in A2O biochemical treatment tank removal waste water and nitrogen, through biofilm reactor, the organic pollutant in waste water is thoroughly decomposed, simultaneously microbial film can active sludge in effectively catching A2O biochemical treatment tank, thus the sewage realized after process reaches emission standard, again for industrial production, useful technique effect and significant practical value can be had.
Accompanying drawing explanation
Fig. 1 is a kind of schema regenerating SCR denitration waste water treatment process of the present invention.
Embodiment
The invention provides a kind of regeneration SCR denitration waste water treatment process, described waste water by equalizing tank, dosing reaction tank, inclined-plate clarifying basin, A2O biochemical treatment tank, clean water basin, is provided with biofilm reactor in described A2O biochemical treatment tank successively.
In technique scheme, the waste water produced in SCR denitration production process is collected in the effect of equalizing tank, further, aerating apparatus can be provided with bottom equalizing tank, bottom pond, blast air by aerating apparatus, make suspended substance be suspended state, be not easily deposited at the bottom of pond, waste water quality after oxygenation stirring is relatively stable, is convenient to follow-up flow process purification of waste water process.
In technique scheme, most suspended substances, partial organic substances and heavy metal ion are removed in the effect of dosing reaction tank, wherein the effect of inclined-plate clarifying basin is by arranging swash plate, reduce sedimentary sedimentation time, and effectively can reduce the volume of settling tank, the reaction process wherein in dosing reaction tank is:
First, calcium hydroxide, flocculant of polymeric aluminium chloride, polyacrylamide, heavy metal chelating agent are fully dissolved, stir in respective medicine-adding bin, regulate pH value with the effect that dosing pump is added to wherein calcium hydroxide in dosing reaction tank again, flocculant of polymeric aluminium chloride carries out de-steady and flocculation to sewage, the effect of polyacrylamide assists flocculate and generate large alumen ustum flocs unit, and heavy metal chelating agent catches heavy-metal ion removal;
Then, molysite is added in waste water, adding alkali adjust ph is 8.5 ~ 9.0, and temperature of reaction is 60 DEG C ~ 70 DEG C, and air blast can generate coffee-like magnetic ferrite slag after being oxidized 20 minutes ~ 30 minutes, its objective is the arsenic removed in waste water, the method arsenic removal efficiency is higher, and the deposit seeds of formation is large, is easy to be separated, and particle can not dissolve again, the problem of non-secondary pollution;
Finally, add reductive agent directly in waste water, Fe
2+generate ferric vandate with vanadate to precipitate, part V
5+be reduced into V
4+, Fe
2+be oxidized to Fe
3+, Fe
3+xFe is generated with vanadate
2o
3yV
2o
52H
2o precipitates, and then adds in calcium hydroxide and free acid, makes remaining vanadium ion generate calcium vanadate precipitation, makes Fe
2+, Fe
3+, Cr
3+generate precipitation of hydroxide.
In technique scheme, the effect of A2O biochemical treatment tank utilizes biological treatment denitrogenation dephosphorizing, this technique forms primarily of two portions: one is dephosphorization, phosphorus in sewage discharges polyP bacteria under anaerobic state, again by its more absorption under good oxygen condition, and discharge system with the form of excess sludge; Two is denitrogenations, under the effect of denitrifier, utilizes BOD5 in water as hydrogen donor, to become nitrogen to escape into air by from the nitrate in Aerobic Pond mixed solution and nitrate reductase.
Wherein, arrange biofilm reactor in A2O biochemical treatment tank, biofilm reactor forms, after sewage enters bio-reactor primarily of bio-reactor and membrane module two part, pollutent is by microbial assimilation and alienation in bio-reactor, and catabolite is generally harmless CO
2and H
2o, Assimilate then becomes the integral part of microorganism.Membrane module is mainly used in retaining microorganism and filtering water outlet, membrane module space is micron order, it is stronger that it retains filteration, thus microorganism can effectively be retained in the reactor, active sludge does not run off with water outlet, thus control the microorganism residence time in the reactor, and in A2O biochemical treatment tank, form the activated sludge concentration of ultrahigh concentration, make pollutent complete decomposition.
In the above-described embodiments, inclined-plate clarifying basin is connected with sludge sump with bottom A2O biochemical treatment tank, and the supernatant liquor of described sludge sump is back in equalizing tank; Simultaneously, also intermediate pool is comprised between inclined-plate clarifying basin and A2O biochemical treatment tank, sanitary sewage is mixed with in described intermediate pool, wherein the effect of sanitary sewage has two: one is, the introducing of sanitary sewage improves the BOD5 concentration of waste water, the biodegradability of waste water is enhanced, and ensure that subsequent biochemical treatment effect; Two are, also processed sanitary sewage, decrease the investment of Sewage Treatment Facilities, have significant economic benefit while raising wastewater biodegradability.
Claims (5)
1. a regeneration SCR denitration waste water treatment process, it is characterized in that, described waste water by equalizing tank, dosing reaction tank, inclined-plate clarifying basin, A2O biochemical treatment tank, clean water basin, is characterized in that, is provided with biofilm reactor in described A2O biochemical treatment tank successively.
2. a kind of regeneration SCR denitration waste water treatment process as claimed in claim 1, it is characterized in that, described inclined-plate clarifying basin is connected with sludge sump with bottom A2O biochemical treatment tank, and the supernatant liquor of described sludge sump is back in equalizing tank.
3. a kind of regeneration SCR denitration waste water treatment process as claimed in claim 1, is characterized in that, be provided with aerating apparatus bottom described equalizing tank.
4. a kind of regeneration SCR denitration waste water treatment process as claimed in claim 1, it is characterized in that, first calcium hydroxide, flocculant of polymeric aluminium chloride, polyacrylamide, heavy metal chelating agent is added, then molysite, reductive agent, calcium hydroxide successively in described dosing reaction tank.
5. a kind of regeneration SCR denitration waste water treatment process as claimed in claim 1, is characterized in that, also comprise intermediate pool between described inclined-plate clarifying basin and A2O biochemical treatment tank, be mixed with sanitary sewage in described intermediate pool.
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| CN201510427856.1A CN105152459B (en) | 2015-07-21 | 2015-07-21 | One kind regeneration SCR denitration waste water treatment process |
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| CN201510427856.1A CN105152459B (en) | 2015-07-21 | 2015-07-21 | One kind regeneration SCR denitration waste water treatment process |
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| CN105152459B CN105152459B (en) | 2017-09-29 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906161A (en) * | 2016-06-15 | 2016-08-31 | 江苏海容热能环境工程有限公司 | Novel process for thermal power plant denitration catalyst regeneration wastewater zero discharging treatment |
| CN106186242A (en) * | 2016-08-23 | 2016-12-07 | 华能国际电力股份有限公司 | The treatment agent of SCR denitration cleaning and regeneration waste liquid and processing method |
| CN108911374A (en) * | 2018-06-29 | 2018-11-30 | 江苏海容热能环境工程有限公司 | A kind of method of waste flue gas denitration catalyst regenerative wastewater degradation of small molecular organic matter |
| WO2020000342A1 (en) * | 2018-06-29 | 2020-01-02 | 江苏海容热能环境工程有限公司 | Method for degrading small molecular organic matter in regenerated wastewater of waste flue gas denitration catalyst |
| CN113683256A (en) * | 2021-08-03 | 2021-11-23 | 安徽康菲尔检测科技有限公司 | Zero-discharge treatment process and treatment device for production wastewater of regenerated SCR (selective catalytic reduction) catalyst |
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|---|---|---|---|---|
| CN101475287A (en) * | 2009-01-06 | 2009-07-08 | 环境保护部华南环境科学研究所 | Novel membrane-biological membrane reactor system and use thereof |
| CN101863591A (en) * | 2010-06-17 | 2010-10-20 | 重庆远达水务有限公司 | Technique for treating wastewater in production of denitration catalyst |
| CN103482825A (en) * | 2013-09-23 | 2014-01-01 | 浙江东发环保工程有限公司 | Method for treating high-ammonia-nitrogen industrial wastewater of denitration catalyst |
-
2015
- 2015-07-21 CN CN201510427856.1A patent/CN105152459B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475287A (en) * | 2009-01-06 | 2009-07-08 | 环境保护部华南环境科学研究所 | Novel membrane-biological membrane reactor system and use thereof |
| CN101863591A (en) * | 2010-06-17 | 2010-10-20 | 重庆远达水务有限公司 | Technique for treating wastewater in production of denitration catalyst |
| CN103482825A (en) * | 2013-09-23 | 2014-01-01 | 浙江东发环保工程有限公司 | Method for treating high-ammonia-nitrogen industrial wastewater of denitration catalyst |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906161A (en) * | 2016-06-15 | 2016-08-31 | 江苏海容热能环境工程有限公司 | Novel process for thermal power plant denitration catalyst regeneration wastewater zero discharging treatment |
| CN106186242A (en) * | 2016-08-23 | 2016-12-07 | 华能国际电力股份有限公司 | The treatment agent of SCR denitration cleaning and regeneration waste liquid and processing method |
| CN108911374A (en) * | 2018-06-29 | 2018-11-30 | 江苏海容热能环境工程有限公司 | A kind of method of waste flue gas denitration catalyst regenerative wastewater degradation of small molecular organic matter |
| WO2020000342A1 (en) * | 2018-06-29 | 2020-01-02 | 江苏海容热能环境工程有限公司 | Method for degrading small molecular organic matter in regenerated wastewater of waste flue gas denitration catalyst |
| CN113683256A (en) * | 2021-08-03 | 2021-11-23 | 安徽康菲尔检测科技有限公司 | Zero-discharge treatment process and treatment device for production wastewater of regenerated SCR (selective catalytic reduction) catalyst |
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| CN105152459B (en) | 2017-09-29 |
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